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15 April, 09:55

What is the molarity of a concentrated hbr solution if the solution is 27.7% hbr by mass and has a density of 1.24 g/ml

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  1. 15 April, 12:57
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    M = No. of moles of solute / Volume of solution in litres

    HBr: H = 1 x 1 = 1 Br = 1 x 80

    Molar mass : 81 g / mol

    a. n = 27.7% / 100 = 0.277 g / (81 g / mol) = 0.0034 mol

    density = 1.24 g/ml; D = m / v

    b. 65.32 ml x 1 L / 1000 mL = 0.065 L

    c. M = n / V

    = 0.0034 mol / 0.065 L

    M = 0.052 mol / L

    The molarity of the concentrated HBr solution is 0.052 mol/L
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